For all practical purposes - Revision history

Apm: /* Example Diffusion on of carbon atoms on diamond surfaces at room temperature. */

2024-10-06T12:54:41Z

Example Diffusion on of carbon atoms on diamond surfaces at room temperature.

← Older revision		Revision as of 14:54, 6 October 2024
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	there can be (and in this case is) [[FAPP]] no diffusion to the point of <br>		there can be (and in this case is) [[FAPP]] no diffusion to the point of <br>
	other mechanisms of atom displacement vastly dominating ([[radiation damage]]). <br>		other mechanisms of atom displacement vastly dominating ([[radiation damage]]). <br>

			Also covered in a "thermodynamics forbids APM - false" subsection on the page: <br>
			[[Common misconceptions about atomically precise manufacturing]].

	== Related ==		== Related ==

Apm: added == Example Diffusion on of carbon atoms on diamond surfaces at room temperature. ==

2024-10-06T12:51:25Z

added == Example Diffusion on of carbon atoms on diamond surfaces at room temperature. ==

← Older revision		Revision as of 14:51, 6 October 2024
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	Free floating atoms are way easier to get into quantum regime than solid state nanomachinery. <br>		Free floating atoms are way easier to get into quantum regime than solid state nanomachinery. <br>
	See: [[Nanomechanics is barely mechanical quantummechanics]]		See: [[Nanomechanics is barely mechanical quantummechanics]]

			== Example Diffusion on of carbon atoms on diamond surfaces at room temperature. ==

			Due to the exponential drop-off of diffusion rates with height of energy barriers <br>
			there can be (and in this case is) [[FAPP]] no diffusion to the point of <br>
			other mechanisms of atom displacement vastly dominating ([[radiation damage]]). <br>

	== Related ==		== Related ==

Apm: /* Example UHV vs PPV */

2024-10-06T12:47:47Z

Example UHV vs PPV

← Older revision		Revision as of 14:47, 6 October 2024
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	With current day technology (2023) creating a perfect vacuum is not at all possible. <br>		With current day technology (2023) creating a perfect vacuum is not at all possible. <br>
	Ok, Except in the inside of a buckyball, but that's not what one usually thinks of. <br>		Ok, Except in the inside of a buckyball, but that's not what one usually thinks of. <br>
			<small>(And even there there's some rather very small probability of a He atom tunneling in. Digressing.)</small> <br>
	Rather one thinks of UHV systems out of steel that can be heated to get rid of adsorbed gas molecules. <br>		Rather one thinks of UHV systems out of steel that can be heated to get rid of adsorbed gas molecules. <br>
	----		----

Apm at 12:45, 6 October 2024

2024-10-06T12:45:03Z

← Older revision		Revision as of 14:45, 6 October 2024
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	'''FAPP … for all practical purposes''' <br>		'''FAPP … for all practical purposes''' <br>
	It may not be truly zero but it could as well be. <br>		Probability of exceptions may not be truly zero but it could as well be. <br>
	FAPP is usually used such: <br>		FAPP is usually used such: <br>
	Whatever the deviation from the ideal, <br>		Whatever the deviation from the ideal, <br>

Apm: /* Related */ added link to what links here

2023-06-14T15:56:32Z

Related: added link to what links here

← Older revision		Revision as of 17:56, 14 June 2023
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	* [[practically perfect vacuum]]		* [[practically perfect vacuum]]
	* [[Impossible]]		* [[Impossible]]
			----
			* [[Special:WhatLinksHere/For_all_practical_purposes]] – quite a nuber of pages lead here

Apm: Apm moved page For all practical purpouses to For all practical purposes

2023-06-14T15:54:46Z

Apm moved page For all practical purpouses to For all practical purposes

← Older revision	Revision as of 17:54, 14 June 2023
(No difference)

Apm: basic page

2023-06-14T15:50:18Z

basic page

New page

{{stub}}

'''FAPP … for all practical purposes''' 
It may not be truly zero but it could as well be. 
FAPP is usually used such: 
Whatever the deviation from the ideal, 
its so extremely small that it does not matter at all 
for all practical purposes.

"FAPP impossible" => See page: [[Impossible]]

{{wikitodo|Extend on the page intro.}}

== Example UHV vs PPV ==

With current day technology (2023) creating a perfect vacuum is not at all possible. 
Ok, Except in the inside of a buckyball, but that's not what one usually thinks of. 
Rather one thinks of UHV systems out of steel that can be heated to get rid of adsorbed gas molecules. 
----
With future advanced [[Main Page|APM]] ([[gemstone metamaterial technology]]) 
[[PPV]] will be possible though. And not just for nanoscale spaces, 
but also for much bigger ones micro, meso, and maybe even macro. 

One will often run in situations where '''there are [[FAPP]] no atoms in a chamber'''. 
Math may give a very very tiny fraction of a single atom. Atoms don't come in fractional quantities. 
Well, ok, in a quantum sense they can so long their quantum dispersed wave function does not get collapsed. 
delaying wave-collapse is hard to do if desired (as it is in quantum computers). 
Free floating atoms are way easier to get into quantum regime than solid state nanomachinery. 
See: [[Nanomechanics is barely mechanical quantummechanics]]

== Related ==

* [[practically perfect vacuum]]
* [[Impossible]]